Analysis

  • max time kernel
    144s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20240215-en
  • resource tags

    arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
  • submitted
    26-05-2024 12:17

General

  • Target

    XClient.exe

  • Size

    39KB

  • MD5

    66f5cca568b2b83c23a69295ad2c643b

  • SHA1

    b822f0bcded0f587413d84f27eb2f5fdcdb48304

  • SHA256

    971294811a8fd3c967958db073238a75573ea1db5749b8153e5f684b27f99da6

  • SHA512

    c8bf4acc4644b614715eeaf4cda10ba100afeceaab0f7b7cb627f1c6f7676308c0c73e7dbbe6833ec3da1f9c10616e2c28a9ba4fc88e180ff3e0123071c50469

  • SSDEEP

    768:VG7+qmT8ztyh6pwDYvCL2v6hCuuJf27iJ1fFWPG9/hL6OOwhnjibH:4fmT8ztyh6pwDnKwCuuJfBFv9/hL6OO3

Malware Config

Extracted

Family

xworm

Version

5.0

C2

127.0.0.1:54921

Mutex

Zv7fhTadtKHCA29x

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

aes.plain

Signatures

  • Detect Xworm Payload 3 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\XClient.exe
    "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1516
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2996
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2504
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3000
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2476
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
      2⤵
      • Creates scheduled task(s)
      PID:2500
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {225C5A7D-BE52-46F6-B962-33D1EAAA0FC6} S-1-5-21-2248906074-2862704502-246302768-1000:GHPZRGFC\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2616
    • C:\Users\Admin\AppData\Roaming\XClient.exe
      C:\Users\Admin\AppData\Roaming\XClient.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2028
    • C:\Users\Admin\AppData\Roaming\XClient.exe
      C:\Users\Admin\AppData\Roaming\XClient.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1572

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

    Filesize

    7KB

    MD5

    2f36e71d27c1f122ac8148595f0610f9

    SHA1

    aa7f5d1a8a9c384108c0a0d4aeeb2e9593524c48

    SHA256

    663a1c580473650dda33efedec7e98d37a322b33b2a89f92a312ebc78ecdfb66

    SHA512

    6b5a31c3aa51c096c1cfa4a890ffb0b57c74525d8750077785f1c29cdcdd4c0911784f539d9fbbfe0aafce4514ac1d5517d0b6063a83a6d2874c1fc89a7dbb9b

  • C:\Users\Admin\AppData\Roaming\XClient.exe

    Filesize

    39KB

    MD5

    66f5cca568b2b83c23a69295ad2c643b

    SHA1

    b822f0bcded0f587413d84f27eb2f5fdcdb48304

    SHA256

    971294811a8fd3c967958db073238a75573ea1db5749b8153e5f684b27f99da6

    SHA512

    c8bf4acc4644b614715eeaf4cda10ba100afeceaab0f7b7cb627f1c6f7676308c0c73e7dbbe6833ec3da1f9c10616e2c28a9ba4fc88e180ff3e0123071c50469

  • \??\PIPE\srvsvc

    MD5

    d41d8cd98f00b204e9800998ecf8427e

    SHA1

    da39a3ee5e6b4b0d3255bfef95601890afd80709

    SHA256

    e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

    SHA512

    cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

  • memory/1516-31-0x000000001B440000-0x000000001B4C0000-memory.dmp

    Filesize

    512KB

  • memory/1516-1-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1516-33-0x000000001B440000-0x000000001B4C0000-memory.dmp

    Filesize

    512KB

  • memory/1516-0-0x000007FEF5C93000-0x000007FEF5C94000-memory.dmp

    Filesize

    4KB

  • memory/1516-32-0x000007FEF5C93000-0x000007FEF5C94000-memory.dmp

    Filesize

    4KB

  • memory/2028-37-0x0000000000F40000-0x0000000000F50000-memory.dmp

    Filesize

    64KB

  • memory/2504-14-0x000000001B610000-0x000000001B8F2000-memory.dmp

    Filesize

    2.9MB

  • memory/2504-15-0x0000000002690000-0x0000000002698000-memory.dmp

    Filesize

    32KB

  • memory/2996-8-0x0000000001E00000-0x0000000001E08000-memory.dmp

    Filesize

    32KB

  • memory/2996-7-0x000000001B740000-0x000000001BA22000-memory.dmp

    Filesize

    2.9MB

  • memory/2996-6-0x0000000002CE0000-0x0000000002D60000-memory.dmp

    Filesize

    512KB